Hi Daniel, thanks for your post. I think there is no problem when the number of dem-dists is smaller than the number of levels. Can you confirm that? Gerd ________________________________________ Von: mkgmap-dev <mkgmap-dev-bounces@lists.mkgmap.org.uk> im Auftrag von Daniel Vogelbacher <daniel@vogelbacher.name> Gesendet: Sonntag, 10. Juli 2022 17:34 An: mkgmap-dev@lists.mkgmap.org.uk Betreff: [mkgmap-dev] Raise an error when levels and dem-dists mismatch Hi all, I've debugged the past two days why a custom map won't be recognized by my Garmin Oregon 700 device. The issue was the dem configuration. My style uses this level mapping: levels = 0:24, 1:22, 2:20, 3:18, 4:16 While my dem distribution line was: dem-dists=3312,6624,9936,13248,16560,19872,23184,26496 So there are only 5 levels defined, but the distribution maps to 8. (I copied the dem-dists line from Freizeitkarte-style without thinking about it...) The build process was successfully, but the map was never listed in the device map selection. After fixing the level mapping in the style/option file, the map gets listed. So may I ask to add a check/exception to prevent building maps when there is a mismatch between levels vs. dem-dists? Thank you! -- Best regards / Mit freundlichen Grüßen Daniel Vogelbacher